Comcast Corp. reported a 26% increase in fourth-quarter profit and signaled an interest in expanding overseas in distribution or content.

Growth was helped by an increase in video customers at its cable business, breaking a more than six-year streak of video subscriber declines. The company added 43,000 video customers, after losing 7,000 a year ago. The cable industry generally has been losing video subscribers for years, mostly to newer competitors such as phone and satellite-TV companies. There also have been signs in...